As a test I created a large horizontal menu (+2000pix) with EB&MM trial and I noticed that the menu disappeared to the right side of my browsers in both Opera & Firefox. Why does the menu not auto adjust its width so that it is completely visible, or is this an option only in the payed version?

The created menu does not change its width spontaneously, it will look exactly as you have designed it. 2000px is probably too wide for a regular web page, you should try to group some of the menu items under submenus.

It is important for me that I have an "auto size" option for my menus, especially with all the smaller devices (with low resolution) that many people now start to use. The menu items must be always visible. Thanks.

Split menu in 2 or more lines, I know it could look ugly but better than no option at all. I could also change the code myself in "style="width: auto (default), but I do not know I'm allowed to do so an I would prefer to see it in MM as an option. Thanks